Individual FEC were loge (n+10) transformed to produce
approximately normally distributed data. All the statistical
analyses were performed with SAS (9.1). The prevalence
rates for the eggs of endoparasites in faecal samples and the
confidence intervals were calculated with the FREQ
procedure. Pearson's correlation coefficients between FEC
and OPG as well as between FEC and age of lambs were
determined using the CORR procedure